Highly thermally conductive carbon nanotubes pillared exfoliated graphite/polyimide composites

Abstract In this work, carbon nanotubes pillared grew on exfoliated graphite by the microwave-assisted method is utilized as thermally conductive fillers (CPEG) in polyimide (PI) to fabricate CPEG/PI thermally conductive composites with the combining ways of “in-situ polymerization, electrospinning,...

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Autores principales:	Yongqiang Guo, Shuangshuang Wang, Kunpeng Ruan, Haitian Zhang, Junwei Gu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Electronics TK7800-8360 Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/f6da5b42637a485c9dc7d53eb6971bc2
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spelling	oai:doaj.org-article:f6da5b42637a485c9dc7d53eb6971bc22021-12-02T16:23:33ZHighly thermally conductive carbon nanotubes pillared exfoliated graphite/polyimide composites10.1038/s41528-021-00113-z2397-4621https://doaj.org/article/f6da5b42637a485c9dc7d53eb6971bc22021-07-01T00:00:00Zhttps://doi.org/10.1038/s41528-021-00113-zhttps://doaj.org/toc/2397-4621Abstract In this work, carbon nanotubes pillared grew on exfoliated graphite by the microwave-assisted method is utilized as thermally conductive fillers (CPEG) in polyimide (PI) to fabricate CPEG/PI thermally conductive composites with the combining ways of “in-situ polymerization, electrospinning, lay-up, and hot-pressing”. The prepared CPEG/PI composites realized the maximum thermal conductivity (λ, 1.92 W m−1 K−1) at low CPEG amount (10 wt%), much higher than that of pure PI (0.28 W m−1 K−1). The λ of CPEG/PI composites show almost no change after 1000 cycles of heating and cooling at the temperature of 25−100 °C. The finite element analysis simulates the nano-/microscale heat transfer in CPEG/PI composites to reveal the internal reason of the λ enhancement. The improved thermal conductivity model and empirical equation could better reflect the actual λ change trend of CPEG/PI composites. The actual application test shows the CPEG/PI composites could significantly reduce the operating temperature of the CPU in mobile phone.Yongqiang GuoShuangshuang WangKunpeng RuanHaitian ZhangJunwei GuNature PortfolioarticleElectronicsTK7800-8360Materials of engineering and construction. Mechanics of materialsTA401-492ENnpj Flexible Electronics, Vol 5, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Electronics TK7800-8360 Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Electronics TK7800-8360 Materials of engineering and construction. Mechanics of materials TA401-492 Yongqiang Guo Shuangshuang Wang Kunpeng Ruan Haitian Zhang Junwei Gu Highly thermally conductive carbon nanotubes pillared exfoliated graphite/polyimide composites
description	Abstract In this work, carbon nanotubes pillared grew on exfoliated graphite by the microwave-assisted method is utilized as thermally conductive fillers (CPEG) in polyimide (PI) to fabricate CPEG/PI thermally conductive composites with the combining ways of “in-situ polymerization, electrospinning, lay-up, and hot-pressing”. The prepared CPEG/PI composites realized the maximum thermal conductivity (λ, 1.92 W m−1 K−1) at low CPEG amount (10 wt%), much higher than that of pure PI (0.28 W m−1 K−1). The λ of CPEG/PI composites show almost no change after 1000 cycles of heating and cooling at the temperature of 25−100 °C. The finite element analysis simulates the nano-/microscale heat transfer in CPEG/PI composites to reveal the internal reason of the λ enhancement. The improved thermal conductivity model and empirical equation could better reflect the actual λ change trend of CPEG/PI composites. The actual application test shows the CPEG/PI composites could significantly reduce the operating temperature of the CPU in mobile phone.
format	article
author	Yongqiang Guo Shuangshuang Wang Kunpeng Ruan Haitian Zhang Junwei Gu
author_facet	Yongqiang Guo Shuangshuang Wang Kunpeng Ruan Haitian Zhang Junwei Gu
author_sort	Yongqiang Guo
title	Highly thermally conductive carbon nanotubes pillared exfoliated graphite/polyimide composites
title_short	Highly thermally conductive carbon nanotubes pillared exfoliated graphite/polyimide composites
title_full	Highly thermally conductive carbon nanotubes pillared exfoliated graphite/polyimide composites
title_fullStr	Highly thermally conductive carbon nanotubes pillared exfoliated graphite/polyimide composites
title_full_unstemmed	Highly thermally conductive carbon nanotubes pillared exfoliated graphite/polyimide composites
title_sort	highly thermally conductive carbon nanotubes pillared exfoliated graphite/polyimide composites
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/f6da5b42637a485c9dc7d53eb6971bc2
work_keys_str_mv	AT yongqiangguo highlythermallyconductivecarbonnanotubespillaredexfoliatedgraphitepolyimidecomposites AT shuangshuangwang highlythermallyconductivecarbonnanotubespillaredexfoliatedgraphitepolyimidecomposites AT kunpengruan highlythermallyconductivecarbonnanotubespillaredexfoliatedgraphitepolyimidecomposites AT haitianzhang highlythermallyconductivecarbonnanotubespillaredexfoliatedgraphitepolyimidecomposites AT junweigu highlythermallyconductivecarbonnanotubespillaredexfoliatedgraphitepolyimidecomposites
_version_	1718384148039598080

Highly thermally conductive carbon nanotubes pillared exfoliated graphite/polyimide composites

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